1/* 2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24/** 25 * @test 26 * @bug 8022632 27 * @summary Test verifies that SPI of WBMP image reader 28 * restores the stream position if an IOException 29 * occurs during processing of image header. 30 * @run main StreamResetTest 31 */ 32 33 34import java.io.IOException; 35import javax.imageio.ImageIO; 36import javax.imageio.ImageReader; 37import javax.imageio.spi.ImageReaderSpi; 38import javax.imageio.stream.ImageInputStreamImpl; 39 40public class StreamResetTest { 41 42 public static void main(String[] args) { 43 IOException expectedException = null; 44 TestStream iis = new TestStream(); 45 46 ImageReader wbmp = ImageIO.getImageReadersByFormatName("WBMP").next(); 47 if (wbmp == null) { 48 System.out.println("No WBMP reader: skip the test"); 49 return; 50 } 51 52 ImageReaderSpi spi = wbmp.getOriginatingProvider(); 53 54 iis.checkPosition(); 55 56 try { 57 spi.canDecodeInput(iis); 58 } catch (IOException e) { 59 expectedException = e; 60 } 61 62 if (expectedException == null) { 63 throw new RuntimeException("Test FAILED: stream was not used"); 64 } 65 66 iis.checkPosition(); 67 68 System.out.println("Test PASSED"); 69 70 } 71 72 private static class TestStream extends ImageInputStreamImpl { 73 private final int errorPos = 1; 74 75 @Override 76 public int read() throws IOException { 77 if (streamPos == errorPos) { 78 throw new IOException("Test exception"); 79 } 80 streamPos++; 81 82 return 0x03; 83 } 84 85 @Override 86 public int read(byte[] b, int off, int len) throws IOException { 87 streamPos += len; 88 return len; 89 } 90 91 public void checkPosition() { 92 if (streamPos != 0) { 93 throw new RuntimeException("Test FAILED"); 94 } 95 } 96 } 97} 98